Jester, FYI, the Tatic and several others do not require a battery package. Just pull out the old cells, and insert the fresh cells. Go down to Walmart, Home Depot, local drug store or such and pick up an Energizer Charger with 4 NIMH cells in it. Maybe pick up another package of 4 cells. Charge and place fresh NIMH in the radio. Total cost is around less than $20.00.
Then place the other 4 cells in the charger to be ready. Now you have plenty transmitter Go-Go for a day's flying.

Other points: If you only have a JR charger, with the center point being negative, cut the cord and place a connector in it. then you can make the charge cord satisfy any Charge recepticle that has the same size male in the transmitter. Just flip the cord connector. Use charger for any real transmitter.

I was disappointed with the Tactic at first until I found that the entire battery recepticle comes right out. The charge recepticle is center point positive. One has a number of options if one so wishes. You could power it up with a normal receiver 4 cell pack.

If you think you will need more simply plug in the Eng. charger into the local outlet and charge while flying. If you really are a field-is-all-mine fellow and flight after flight, Harbor Freight sells a beautiful little gas generator for under $100.00. I donated one for the Jetero RC Club's Raffle for the excellent Wounded Warrior Fly-In on Aug 19, '13. There is much more to this sport than simply keeping a toy airplane in the sky. No, I do not work for Har. Frt.